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Auth0 vs Fat Free CRM: 2026 Comparison

Auth0 Fat Free CRM
Overview A flexible authentication and authorization platform for building secure login experiences with social, passwordless, and MFA support. A lightweight open-source Ruby on Rails CRM application designed for small teams who want a simple self-hosted solution.
Pricing Freemium (Free-$23/1K MAU) Freemium (Free (open source))
Key Features
  • Universal Login
  • Social connections
  • MFA
  • Passwordless
  • SSO
  • RBAC
  • Breached password detection
  • Extensibility
  • Contact management
  • Lead tracking
  • Opportunity management
  • Campaign tracking
  • Task management
  • User management
  • Custom fields
  • Tagging
Pros
  • Comprehensive auth solution
  • Many social providers
  • Good documentation
  • Flexible rules
  • Free and lightweight
  • Simple to use
  • Ruby on Rails based
  • Clean interface
Cons
  • Expensive at scale
  • Complex pricing
  • Can be overkill
  • Okta acquisition concerns
  • No longer actively maintained
  • Very basic features
  • Small community
  • Limited integrations